<!DOCTYPE html>
<html>
<head>
  <script src="face-api.js"></script>
  <script src="js/commons.js"></script>
  <script src="js/faceDetectionControls.js"></script>
  <link rel="stylesheet" href="styles.css">
  <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/css/materialize.css">
  <script type="text/javascript" src="https://code.jquery.com/jquery-2.1.1.min.js"></script>
  <script src="https://cdnjs.cloudflare.com/ajax/libs/materialize/0.100.2/js/materialize.min.js"></script>
</head>
<body>
  <div id="navbar"></div>
  <div class="center-content page-container">

    <div class="progress" id="loader">
      <div class="indeterminate"></div>
    </div>
    <div style="position: relative" class="margin">
      <video onloadedmetadata="onPlay(this)" id="inputVideo" autoplay muted playsinline></video>
      <canvas id="overlay" />
    </div>

    <div class="row side-by-side">

      <!-- face_detector_selection_control -->
      <div id="face_detector_selection_control" class="row input-field" style="margin-right: 20px;">
        <select id="selectFaceDetector">
          <option value="ssd_mobilenetv1">SSD Mobilenet V1</option>
          <option value="tiny_face_detector">Tiny Face Detector</option>
        </select>
        <label>Select Face Detector</label>
      </div>
      <!-- face_detector_selection_control -->

      <!-- check boxes -->
      <div class="row" style="width: 220px;">
        <input type="checkbox" id="hideBoundingBoxesCheckbox" onchange="onChangeHideBoundingBoxes(event)" />
        <label for="hideBoundingBoxesCheckbox">Hide Bounding Boxes</label>
      </div>
      <!-- check boxes -->

      <!-- fps_meter -->
      <div id="fps_meter" class="row side-by-side">
        <div>
          <label for="time">Time:</label>
          <input disabled value="-" id="time" type="text" class="bold">
          <label for="fps">Estimated Fps:</label>
          <input disabled value="-" id="fps" type="text" class="bold">
        </div>
      </div>
      <!-- fps_meter -->

    </div>


    <!-- ssd_mobilenetv1_controls -->
    <span id="ssd_mobilenetv1_controls">
      <div class="row side-by-side">
        <div class="row">
          <label for="minConfidence">Min Confidence:</label>
          <input disabled value="0.5" id="minConfidence" type="text" class="bold">
        </div>
        <button
          class="waves-effect waves-light btn"
          onclick="onDecreaseMinConfidence()"
        >
          <i class="material-icons left">-</i>
        </button>
        <button
          class="waves-effect waves-light btn"
          onclick="onIncreaseMinConfidence()"
        >
          <i class="material-icons left">+</i>
        </button>
      </div>
    </span>
    <!-- ssd_mobilenetv1_controls -->

    <!-- tiny_face_detector_controls -->
    <span id="tiny_face_detector_controls">
      <div class="row side-by-side">
        <div class="row input-field" style="margin-right: 20px;">
          <select id="inputSize">
            <option value="" disabled selected>Input Size:</option>
            <option value="128">128 x 128</option>
            <option value="160">160 x 160</option>
            <option value="224">224 x 224</option>
            <option value="320">320 x 320</option>
            <option value="416">416 x 416</option>
            <option value="512">512 x 512</option>
            <option value="608">608 x 608</option>
          </select>
          <label>Input Size</label>
        </div>
        <div class="row">
          <label for="scoreThreshold">Score Threshold:</label>
          <input disabled value="0.5" id="scoreThreshold" type="text" class="bold">
        </div>
        <button
          class="waves-effect waves-light btn"
          onclick="onDecreaseScoreThreshold()"
        >
          <i class="material-icons left">-</i>
        </button>
        <button
          class="waves-effect waves-light btn"
          onclick="onIncreaseScoreThreshold()"
        >
          <i class="material-icons left">+</i>
        </button>
      </div>
    </span>
    <!-- tiny_face_detector_controls -->

  </body>

  <script>
    let forwardTimes = []
    let withBoxes = true

    function onChangeHideBoundingBoxes(e) {
      withBoxes = !$(e.target).prop('checked')
    }

    function updateTimeStats(timeInMs) {
      forwardTimes = [timeInMs].concat(forwardTimes).slice(0, 30)
      const avgTimeInMs = forwardTimes.reduce((total, t) => total + t) / forwardTimes.length
      $('#time').val(`${Math.round(avgTimeInMs)} ms`)
      $('#fps').val(`${faceapi.utils.round(1000 / avgTimeInMs)}`)
    }

    async function onPlay() {
      const videoEl = $('#inputVideo').get(0)

      if(videoEl.paused || videoEl.ended || !isFaceDetectionModelLoaded())
        return setTimeout(() => onPlay())


      const options = getFaceDetectorOptions()

      const ts = Date.now()

      const result = await faceapi.detectSingleFace(videoEl, options).withFaceExpressions()

      updateTimeStats(Date.now() - ts)

      if (result) {
        const canvas = $('#overlay').get(0)
        const dims = faceapi.matchDimensions(canvas, videoEl, true)

        const resizedResult = faceapi.resizeResults(result, dims)
        const minConfidence = 0.05
        if (withBoxes) {
          faceapi.draw.drawDetections(canvas, resizedResult)
        }
        faceapi.draw.drawFaceExpressions(canvas, resizedResult, minConfidence)
      }

      setTimeout(() => onPlay())
    }

    async function run() {
      // load face detection and face expression recognition models
      await changeFaceDetector(TINY_FACE_DETECTOR)
      await faceapi.loadFaceExpressionModel('/')
      changeInputSize(224)

      // try to access users webcam and stream the images
      // to the video element
      const stream = await navigator.mediaDevices.getUserMedia({ video: {} })
      const videoEl = $('#inputVideo').get(0)
      videoEl.srcObject = stream
    }

    function updateResults() {}

    $(document).ready(function() {
      renderNavBar('#navbar', 'webcam_face_expression_recognition')
      initFaceDetectionControls()
      run()
    })
  </script>
</body>
</html>